Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 0-by-1.

Question

Miguel Cardoso 2020-5-21

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https://ww2.mathworks.cn/matlabcentral/answers/528918-unable-to-perform-assignment-because-the-size-of-the-left-side-is-1-by-1-and-the-size-of-the-right-s

评论： Miguel Cardoso 2020-5-21

采纳的回答： KSSV

data.mat

在 MATLAB Online 中打开

There is a lot of questions here on the community but no one answer porperly my question.

Here is the code:

load('data.mat')
v=0.90:0.01:1.05;
ca=0.95:0.01:1.05;
for i=1:length(v)
    for j=1:length(ca)
        ij=find(data(:,1)==v(i) & data(:,2)==ca(j));
        M(i,j)=data(ij,3);
    end
end
[V,CA]=meshgrid(v,ca);
contourf(V,CA,M,20);

Hope you can help me. I attached the data file.

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Answer 1

KSSV 2020-5-21

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https://ww2.mathworks.cn/matlabcentral/answers/528918-unable-to-perform-assignment-because-the-size-of-the-left-side-is-1-by-1-and-the-size-of-the-right-s#answer_435153

在 MATLAB Online 中打开

You want this.

S = load("data.mat") ;
data = S.Fe2MnGe_new ; 
v = data(:,1) ; 
ca = data(:,2) ; 
z = data(:,3) ; 
nx = length(unique(v)) ; ny = length(unique(ca)) ; 
X = reshape(v,ny,nx) ; 
Y = reshape(ca,ny,nx) ; 
Z = reshape(z,ny,nx) ; 
contour(X,Y,Z)